A brush direct current motor

Abstract

The utility model discloses a brush DC motor, including the casing, the inside of casing is provided with heat abstractor, and heat abstractor includes the fixed cylinder of setting in the inside of casing, the side surface inner wall fixedly connected with brush DC motor body of fixed cylinder, and one end of brush DC motor body is fixedly connected with the output shaft, and the other end of output shaft extends to the outside of casing, and the circumferential side surface inner wall and the outer wall of casing are evenly provided with the through groove between, and the both sides inner wall of through groove is slidably connected with the heat conduction plate, and the bottom of heat conduction plate extends to the inside of fixed cylinder, the utility model discloses the heat conduction plate of setting, and brush DC motor body drives the output shaft rotation when working, and the fan blade is driven to rotate by output shaft, and the airflow is driven to flow by fan blade, and the airflow is flowed through heat conduction plate after entering the casing, and heat conduction plate conducts and radiates the heat of brush DC motor body to the airflow, makes the airflow carry heat and leave the device while insulating brush DC motor body.

Description

Technical Field

[0001] This utility model relates to the field of brushed DC motor technology, and in particular to a brushed DC motor. Background Technology

[0002] A brushed DC motor is a rotary motor that uses DC power and relies on the mechanical contact between internal brushes and a commutator to achieve motor commutation.

[0003] A search revealed a utility model patent with application number 202421131207.8, entitled "A Brushed DC Motor." This patented device uses a first and a second fixing post on the rear end cover to fix the first and second carbon brush supports to the first and second fixing posts respectively. This makes the fixation of the first and second carbon brush supports more secure, reducing the problem of contact friction between the first and second carbon brushes and the commutator ring caused by the instability of the first and second carbon brush supports, thus improving the service life of the utility model. By setting an anchoring washer at the connection between the rear end cover and the armature, the pressure when the armature is connected to the rear end cover is reduced. By opening a first heat dissipation hole on the motor housing and a second heat dissipation hole on the rear end cover, the heat dissipation performance of the utility model is effectively improved.

[0004] However, this patented device can cause dust to get into the internal bearings and rotor of the brushed DC motor during the heat dissipation process, which can lead to increased mechanical wear of the brushed DC motor and affect its service life. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a brushed DC motor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A brushed DC motor includes a housing, inside which a heat dissipation mechanism is provided. The heat dissipation mechanism includes a fixed cylinder disposed inside the housing. A brushed DC motor body is fixedly connected to the inner side wall of the fixed cylinder. An output shaft is fixedly connected to one end of the brushed DC motor body, and the other end of the output shaft extends to the outside of the housing. A through groove is evenly formed between the inner and outer walls of the circumferential side of the housing. A heat-conducting plate is slidably connected between the inner walls of the two through grooves. The bottom of the heat-conducting plate extends into the interior of the fixed cylinder, and the top of the heat-conducting plate extends into the interior of the housing. Heat dissipation grooves are evenly formed on both sides of the heat-conducting plate. Fan blades located between the side of the fixed cylinder and the side of the housing are evenly fixedly connected to the circumferential side of the output shaft.

[0008] Preferably, the heat-conducting plate has staggered openings evenly distributed between its two sides. A rotating sleeve is rotatably connected to the inner wall of the circumferential side of the opening. A heat-conducting column is rotatably connected to the inner wall of the circumferential side of the rotating sleeve. The two ends of the heat-conducting column extend to the two sides of the heat-conducting plate, respectively. The circumferential side of the heat-conducting column has slots evenly distributed.

[0009] Preferably, a fixing ring aligned with the brushed DC motor body is rotatably connected to the inner side wall of the housing. The outer side wall of the fixing ring is roughened, and a fixing plate is fixedly connected to the other end of the fixing ring.

[0010] Preferably, both the circumferential side of the fixing plate and the circumferential side of the fixing cylinder are rotatably connected to an annular plate, and the circumferential side of the annular plate is rotatably connected to the inner wall of the circumferential side of the shell.

[0011] Preferably, the side of the fixing plate is uniformly fixedly connected with extrusion blocks located inside the fixing cylinder, and the bottom of the heat-conducting plate is fixedly connected with protrusions aligned with the extrusion blocks, with the other end of the protrusions abutting against the top two sides of the extrusion blocks.

[0012] Preferably, an opening 1 is evenly provided between the inner wall and the outer wall of the side of the shell, an opening 3 is evenly provided between the inner wall and the outer wall of the other side of the shell, and an opening 2 is evenly provided between the two sides of the ring plate.

[0013] Preferably, the inner side of the fixed cylinder is evenly provided with telescopic grooves aligned with the heat-conducting plate. A lifting plate is slidably connected to one inner wall of the telescopic groove, and the other side of the lifting plate is fixedly connected to one side of the heat-conducting plate. A spring is fixedly connected between the top of the lifting plate and the top inner wall of the telescopic groove.

[0014] Compared with the prior art, the present invention provides a brushed DC motor with the following advantages:

[0015] The heat-conducting plate allows the brushed DC motor to rotate, driving the output shaft, which in turn rotates the fan blades. The fan blades then drive airflow, which enters the housing and flows through the heat-conducting plate. The heat-conducting plate conducts and dissipates the heat generated by the brushed DC motor into the airflow. This process isolates the brushed DC motor while the airflow carries the heat away from the device, preventing dust from entering the internal bearings and rotor during the motor's cooling process. This prevents increased mechanical wear and reduced lifespan of the brushed DC motor. The airflow, through slots, drives the heat-conducting column to rotate, ensuring full contact between the airflow and the column's circumference. This increases the contact area between the device and the airflow, further accelerating heat dissipation. Rotating the fixing ring causes the fixing plate to rotate, which in turn drives the pressing block. This causes the pressing block to engage or disengage from the protrusion, scraping the heat-conducting plate against the fixing cylinder during its up-and-down movement. This scrapes away dust and debris from the heat-conducting plate, facilitating cleaning and maintaining the device's operational efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a brushed DC motor proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of a brushed DC motor proposed in this utility model;

[0018] Figure 3 This is a partial structural schematic diagram of a brushed DC motor proposed in this utility model;

[0019] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 1-Shell, 2-Fixing ring, 3-Fixing plate, 4-Opening one, 5-Opening two, 6-Ring plate, 7-Brushed DC motor body, 8-Extrusion block, 9-Heat-conducting plate, 10-Fixing cylinder, 11-Opening three, 12-Output shaft, 13-Fan blade, 14-Protrusion, 15-Slot, 16-Heat dissipation groove, 17-Rotating sleeve, 18-Heat-conducting column, 19-Spring, 20-Lifting plate, 21-Telescopic groove. Detailed Implementation

[0021] Example, refer to Figure 1-4A brushed DC motor includes a housing 1. A heat dissipation mechanism is provided inside the housing 1. The heat dissipation mechanism includes a fixed cylinder 10 disposed inside the housing 1. A brushed DC motor body 7 is fixedly connected to the inner side wall of the fixed cylinder 10. An output shaft is fixedly connected to one end of the brushed DC motor body 7. The other end of the output shaft extends to the outside of the housing 1. A through groove is evenly opened between the inner and outer walls of the circumferential side of the housing 1. A heat-conducting plate 9 is slidably connected between the inner walls of the two sides of the through groove. The bottom of the heat-conducting plate 9 extends into the interior of the fixed cylinder 10. The top of the heat-conducting plate 9 extends into the interior of the housing 1. Heat dissipation grooves 16 are evenly opened on both sides of the heat-conducting plate 9. Fan blades 13 located between the side of the fixed cylinder 10 and the side of the housing 1 are evenly fixedly connected to the circumferential side of the output shaft 12.

[0022] In this utility model, the heat-conducting plate 9 has staggered openings evenly distributed between its two sides. A rotating sleeve 17 is rotatably connected to the inner wall of the circumferential side of the opening. A heat-conducting column 18 is rotatably connected to the inner wall of the circumferential side of the rotating sleeve 17. The two ends of the heat-conducting column 18 extend to the two sides of the heat-conducting plate 9 respectively. A slot 15 is evenly distributed on the circumferential side of the heat-conducting column 18.

[0023] A fixing ring 2, which is aligned with the brushed DC motor body 7, is rotatably connected to the inner side wall of the housing 1. The outer side wall of the fixing ring 2 is roughened, and a fixing plate 3 is fixedly connected to the other end of the fixing ring 2.

[0024] Both the circumferential side of the fixed plate 3 and the circumferential side of the fixed cylinder 10 are rotatably connected to the ring plate 6, and the circumferential side of the ring plate 6 is rotatably connected to the inner wall of the circumferential side of the shell 1.

[0025] The side of the fixed plate 3 is uniformly fixedly connected with the extrusion block 8 located inside the fixed cylinder 10, and the bottom of the heat-conducting plate 9 is fixedly connected with the protrusion 14 aligned with the extrusion block 8, and the other end of the protrusion 14 abuts against the top two sides of the extrusion block 8.

[0026] An opening 4 is evenly provided between the inner and outer walls of the side of the shell 1, an opening 3 11 is evenly provided between the inner and outer walls of the other side of the shell 1, and an opening 2 5 is evenly provided between the two sides of the ring plate 6.

[0027] The fixed cylinder 10 has evenly distributed telescopic grooves 21 aligned with the heat-conducting plate 9 on its circumferential side. A lifting plate 20 is slidably connected to one inner wall of the telescopic groove 21, and the other side of the lifting plate 20 is fixedly connected to one side of the heat-conducting plate 9. A spring 19 is fixedly connected between the top of the lifting plate 20 and the top inner wall of the telescopic groove 21.

[0028] Working principle: When the brushed DC motor body 7 is working, it drives the output shaft 12 to rotate, the output shaft 12 drives the fan blades 13 to rotate, and the fan blades 13 drive the airflow. After the airflow enters the housing 1, it flows through the heat conduction plate 9. The heat conduction plate 9 conducts and dissipates the heat generated by the brushed DC motor body 7 into the airflow. This allows the airflow to carry the heat away from the device while isolating the brushed DC motor body 7. This helps prevent dust from getting into the internal bearings, rotor, etc., during the heat dissipation process of the brushed DC motor body 7, which would increase the mechanical wear of the brushed DC motor body 7 and affect its service life. The airflow passes through the slots. 15 drives the heat-conducting column 18 to rotate. When the heat-conducting column 18 rotates, the airflow fully contacts the circumferential side of the heat-conducting column 18, which helps to increase the contact area between the device and the airflow and further accelerate the heat dissipation effect of the device. Rotating the fixing ring 2 drives the fixing plate 3 to rotate, and the fixing plate 3 drives the extrusion block 8 to rotate, so that the extrusion block 8 is engaged under the protrusion 14 or disengaged from the protrusion 14. This causes the heat-conducting plate 9 to scrape against the fixing cylinder 10 during the up and down movement, thereby scraping off the dust and debris on the heat-conducting plate 9. This helps the device clean the dust and debris on the heat-conducting plate 9 and maintain the working effect of the device.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A brushed DC motor comprising a housing (1), characterized in that, The housing (1) is provided with a heat dissipation mechanism, which includes a fixed cylinder (10) disposed inside the housing (1). A brushed DC motor body (7) is fixedly connected to the inner wall of the side of the fixed cylinder (10). One end of the brushed DC motor body (7) is fixedly connected to an output shaft, and the other end of the output shaft extends to the outside of the housing (1). A through groove is evenly opened between the inner wall and the outer wall of the circumferential side of the housing (1). A heat-conducting plate (9) is slidably connected between the inner walls of the two sides of the through groove. The bottom of the heat-conducting plate (9) extends to the inside of the fixed cylinder (10), and the top of the heat-conducting plate (9) extends to the inside of the housing (1). Heat dissipation grooves (16) are evenly opened on both sides of the heat-conducting plate (9). A fan blade (13) located between the side of the fixed cylinder (10) and the side of the housing (1) is evenly fixedly connected to the circumferential side of the output shaft (12).

2. A brushed DC motor according to claim 1, characterized in that The heat-conducting plate (9) has staggered openings evenly spaced between its two sides. A rotating sleeve (17) is rotatably connected to the inner wall of the circumferential side of the opening. A heat-conducting column (18) is rotatably connected to the inner wall of the circumferential side of the rotating sleeve (17). The two ends of the heat-conducting column (18) extend to the two sides of the heat-conducting plate (9) respectively. A slot (15) is evenly spaced on the circumferential side of the heat-conducting column (18).

3. A brushed DC motor according to claim 2, characterized in that The inner side wall of the housing (1) is rotatably connected to a fixing ring (2) aligned with the brushed DC motor body (7). The outer side wall of the fixing ring (2) is roughened, and the other end of the fixing ring (2) is fixedly connected to a fixing plate (3).

4. A brushed DC motor according to claim 3, characterized in that The circumferential side of the fixed plate (3) and the circumferential side of the fixed cylinder (10) are rotatably connected to the ring plate (6), and the circumferential side of the ring plate (6) is rotatably connected to the inner wall of the circumferential side of the shell (1).

5. A brushed DC motor according to claim 4, characterized in that The side of the fixed plate (3) is uniformly fixedly connected with the extrusion block (8) located inside the fixed cylinder (10), and the bottom of the heat-conducting plate (9) is fixedly connected with the protrusion (14) aligned with the extrusion block (8), and the other end of the protrusion (14) abuts against the top two sides of the extrusion block (8).

6. A brushed DC motor according to claim 5, characterized in that An opening 1 (4) is uniformly provided between the inner and outer walls of the side of the shell (1), an opening 3 (11) is uniformly provided between the inner and outer walls of the other side of the shell (1), and an opening 2 (5) is uniformly provided between the two sides of the ring plate (6).

7. A brushed DC motor according to claim 6, characterized in that The fixed cylinder (10) has a uniformly distributed telescopic groove (21) aligned with the heat-conducting plate (9) on its circumferential side surface. A lifting plate (20) is slidably connected to one inner wall of the telescopic groove (21), and the other side of the lifting plate (20) is fixedly connected to one side of the heat-conducting plate (9). A spring (19) is fixedly connected between the top of the lifting plate (20) and the top inner wall of the telescopic groove (21).

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